Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d18a33142b1247b…

MALICIOUS

PDF

43.6 KB Created: 2021-06-04 00:16:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5f1b0d7bd3eefc6daa6fef332d57e2e0 SHA-1: d306dea575900783c451cdf39aa19ef6d693a720 SHA-256: 6d18a33142b1247b177a57d21197578cdd69b63b7a4f0a5144a41c50ae789219
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links to external websites, many of which are structured as SEO-optimized links for popular games like Coin Master and Robux. The presence of a PDF_SEO_LINK_FARM heuristic firing indicates a large number of these links, suggesting a link farm designed to redirect users to potentially malicious content or phishing sites. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/406889139/coin-master-daily-free-spins-link-blogspot-game-hack
    • http://perpus.i2s-learning.com/repository/how-to-actually-get-free-robux_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/microsoft-store-robux_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/minecraft-bedrock-edition-free-with-java_GM479516143.pdf
    • http://perpus.i2s-learning.com/repository/free-robux-co_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/free-robux-codes-no-verification-2021_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/daily-free-spins-coin-master_GM406889139.pdf
    • http://perpus.i2s-learning.com//repository/codes-how-to-get-free-robux_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-and-coins_GM406889139.pdf
    • http://perpus.i2s-learning.com//repository/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/pokemon-go-free-roam-hack_GM1094591345.pdf
    • http://perpus.i2s-learning.com/repository/60-free-spins-coin-master_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/roblox-robux-hack_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/free-daily-spins-and-coins-for-coin-master_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/coin-master-hack-online-android_GM406889139.pdf
    • http://perpus.i2s-learning.com//repository/free-coins-coin-master_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/coin-master-free-spin-trick_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ecd.bin
21b41152fa683bb47e2d9c713189d830d3fcc8f27f1863f669e80b873e273d0d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ECD 24380 bytes
font_01_sfnt_off0000857e.bin
91cb98fff4e9dd196eede8bbbb9776803ea6f152f08e09a586deabb4e02cce34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x857E 18980 bytes

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